功不可沒

Achievement or accomplishment; merit or good result; work or effort; success; a type of mourning attire.

Function word; no; not; un-; negative prefix; used to form questions or emphasize a statement; sometimes used for rhythm.

Able to; can; may; to permit; to approve; suitable; worth; but; however; certainly; very.

Not; have not; none; to drown; to sink; to end; to disappear; to die; to be submerged.